Google has confirmed that they ran a refresh to the Google Panda algorithm on Wednesday, November 21st.

On November 20th, we asked Google about a Panda refresh – since we were fairly confident there was some sort of update. Google told us there was no update but an update would be coming within 7 to 10 days. The update came a day later, not several days later.

This would make this the 22nd Panda refresh we’ve tracked. The 21st Panda refresh was on November 5th and impacted about 1.1% of English queries. This update, Google told us 0.8% of English queries were affected to a degree that a regular user might notice.